<button class="button">hover me !</button>

<style>
/* From Uiverse.io by ercnersoy  - Tags: simple, purple, minimalist, button */
.button {
  cursor: pointer;
  padding: 1rem 4rem;
  border: 0;
  background-color: rebeccapurple;
  color: white;
  box-shadow: 0px 10px 0px 0px rgb(68, 37, 99);
  transition: all 0.9s ease-in-out;
  font-weight: 600;
  font-family: "Lucida Sans", "Lucida Sans Regular", "Lucida Grande",
    "Lucida Sans Unicode", Geneva, Verdana, sans-serif;
  font-size: 1rem;
  position: relative;
}
.button:hover {
  box-shadow: 0px 10px 0px 0px rgb(122, 71, 173);
  background-color: rgb(80, 31, 129);
}
.button:active {
  box-shadow: 0px 5px 0px 0px rgb(122, 71, 173);
  text-shadow: 0 0px 0px #000;
}

.button::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0px;
  box-shadow: 0px 10px 0px 0px rgb(229, 104, 9);
  width: 0;
  height: 10px;
  transition: all 0.9s ease-in-out;
}
.button:hover::before {
  width: 100%;
}

</style>
    